cubicweb #1914011 [diet] move CWPermission and related code to a dedicated cube [resolved]

would be easier to grasp / document / etc.

prioritynormal
typeenhancement
done in3.14.0
load1.000
load left0.000
closed by#7f5c455ec7d1 [cubification] moved CWPermission handling into a localperms cube. closes #1914011, #a1d5365fefc1 [cubification] moved CWPermission handling into a localperms cube. closes #1914011